You are evaluating whether to purchase Windows Server 2008 R2 Service Pack 1 (SP1).

Several weeks ago, you installed Windows Server 2008 R2 SP1 on a server. During the installation, you did not enter a product key.

You need to identify how many days remain until the license status of the server will change to Unlicensed.

Which tool should you use ?

A.
Slmgr.vbs

B.
Computer management

C.
Wevutil.exe

D.
System Configuration